<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<style>
     div{
         position: absolute;
         position: relative;
         position: fixed;
     }
</style>
  <script>
       var a=typeof function () {}==='function'&&5>4?6:9;
      console.log(a)
       console.log(typeof function () {}==='function')
       console.log(typeof function () {}==='asdf')
      console.log(true&&5>4?6:!9)
      console.log( false&&!false||5<4?6:9)

  </script>
</body>
</html>